Diagnosis Expert System Based On Fault Tree Analysis Of Aviation Piston Engine Failure

Aviation piston engine failure issue is not only a direct threat to the safe and efficient engine operation, but may also induce other failure, or even flying accidents. Therefore, accurate diagnosis and prompt troubleshooting for the safe operation of the engine is significant.The thesis makes a comprehensive analysis of aviation piston engine structure and function of the composition principle and divides the engine into seven sub-system, namely, the engine body, ignition system, fuel system, oil system, air intake system, exhaust system, the operating system. By a comprehensive analysis of each system failure mode and cause of failure and establishing the corresponding fault tree, they can show the various systems and intuitive failure causes and failure modes.Due to the experience and level of maintenance personnel can not be all at the expert level, when the older generation of experienced maintenance personnel retired and maintenance engineer or an expert-level personnel changes, for a maintenance department, most likely there will be a maintenance level of merchandise in question. So how can we prevent this from happening, and effectively a continuation of the existing maintenance capacity in a planned, to improve the level step by step and quality of the maintenance unit does? In this article, we will be rich by the maintenance staff, so the row of experience and knowledge of maintenance engineers, the system organized and then summarized and refined, and then translated into a computer to recognize in the code which is stored on a computer inside, that is, the knowledge generated Diagnosis library, the establishment of an engine troubleshooting expert system, and through man-machine interface, the way they interact with the user guide users step by step in-depth diagnosis and ultimately to determine the location and cause the engine to fail given diagnostic conclusions,and make maintenance recommendations to achieve the engine failure of the expert-level diagnostics.This not only avoids the unit for maintenance personnel changes affecting the maintenance standard units,but also easy to make a general maintenance staff in case of breakdown,can also be prompted through the expert system, and gradually find out the cause of the malfunction,and finally troubleshooting.Exactly speaking, a large number of aviation piston engine failure data and maintenance experience to be expressed in the form of fault tree, while the fault tree is summaried and refined to produce an aviation piston engine expert system.It can finalize the location and cause of the failures and put forward the maintenance recommendations so that ultimately bring about the engine fault entirely ruled out.